package book;

//书架
public class BookList {
    private static final int DEFAULT_SIZE = 30;//常量
    private Book[] books = new Book[DEFAULT_SIZE];//表示书架上能放30本书

    private int usedSize;//记录当前books数组当中 有多少本书？

    public BookList(){
        books[0] = new Book("三国演义","罗贯中",89,"小说");
        books[1] = new Book("西游记","吴承恩",78,"小说");
        books[2] = new Book("红楼梦","曹雪芹",86,"小说");
        books[3] = new Book("水浒传","施耐庵",75,"小说");
        this.usedSize = 4;
    }

    public Book getBook(int pos) {
        return this.books[pos];
    }

    public void setBook(Book book) {
        this.books[usedSize] = book;
    }

    public void setBook(int pos,Book book) {
        this.books[pos] = book;
    }

    public int getUsedSize() {
        return usedSize;
    }

    public void setUsedSize(int usedSize) {
        this.usedSize = usedSize;
    }
}
